I tried with the default x server and the 2.6.34 kernel as the only package from xorg-edgers. That did not improve things.
I noticed that there is only one entry in /sys/class/backlight/ which is called acpi_video0 and this apparently controls only the backlight of the built-in laptop monitor. When booting with the HDMI cable connected, the Xorg.0.log says: (II) intel(0): EDID for output HDMI1 ... (II) intel(0): DPMS capabilities: Off What does this "Off" mean? For the internal screen it says: (II) intel(0): EDID for output LVDS1 ... (II) intel(0): No DPMS capabilities specified -- monitor does not accept hdmi https://bugs.launchpad.net/bugs/571406 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs